@Override
public Address getSingleAddress(
AddressType t, Collection<Address> addresses, Location whoIsAsking) {
if (addresses == null || addresses.size() == 0) {
return null;
}
for (DnsProvider p : getProviders()) {
Address rewrite = p.getAddress(this, t, addresses, whoIsAsking);
if (rewrite != null) {
return rewrite;
}
}
Iterator<Address> i = addresses.iterator();
Address first = i.next();
if (addresses.size() == 1 || whoIsAsking == null) {
return first;
}
// return the address local to who is asking if available
Address a = first;
while (a != null) {
if (a.getAddress().equals(whoIsAsking.getAddress())) {
return a;
}
a = (i.hasNext() ? i.next() : null);
}
// first is as good as any other
return first;
}
@Override
public List<ResourceRecords> getResourceRecords(Location whoIsAsking) {
List<ResourceRecords> rrs = new ArrayList<ResourceRecords>();
for (DnsProvider p : getProviders()) {
List<ResourceRecords> rRecords = p.getResourceRecords(this, whoIsAsking);
if (rRecords != null) {
rrs.addAll(rRecords);
}
}
return rrs;
}
